Revert "Switch to toybox timeout."

This reverts commit e9f471635f038ff0ba1d42772b0e85bb99c800be.

Reason for revert: Multiple art-test failures

Change-Id: I550864c23485a438889ab73c7e4a877cd730cabb
diff --git a/ui/build/paths/config.go b/ui/build/paths/config.go
index d92649f..54006d2 100644
--- a/ui/build/paths/config.go
+++ b/ui/build/paths/config.go
@@ -104,6 +104,7 @@
 	"rsync":    Allowed,
 	"sh":       Allowed,
 	"tar":      Allowed,
+	"timeout":  Allowed,
 	"tr":       Allowed,
 	"unzip":    Allowed,
 	"zip":      Allowed,
@@ -165,7 +166,6 @@
 	"stat":      LinuxOnlyPrebuilt,
 	"tail":      LinuxOnlyPrebuilt,
 	"tee":       LinuxOnlyPrebuilt,
-	"timeout":   LinuxOnlyPrebuilt,
 	"touch":     LinuxOnlyPrebuilt,
 	"true":      LinuxOnlyPrebuilt,
 	"uname":     LinuxOnlyPrebuilt,